the contraction of two syllables or two vowels into one, especially the contraction of two vowels so as to form a diphthong.
Origin of synaeresis
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Examples from the Web for synaeresis
Diaeresis or synaeresis may usually be employed according to the case.Legends, Tales and Poems|Gustavo Adolfo Becquer
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012